论文标题
GAMMA二进制伽马射线的GEV排放和脉冲星场景
GeV emission of gamma-ray binary with pulsar scenario
论文作者
论文摘要
我们通过假设紧凑的物体是年轻的脉冲星来研究伽马射线二进制的GEV发射。我们假设，洛伦兹因子为10^4〜5的相对论无震的脉冲星风可以通过伴侣恒星的致密软孔场中的反compton散射过程产生GEV发射。向观察者移动的无震动的脉冲星的行程距离取决于脉冲星的轨道相。我们讨论GEV发射的轨道调节是伴侣恒星的无震脉冲风和各向异性软孔场的旅行距离的影响的结果。在本文中，我们研究未落下的脉冲星的行程距离的影响如何影响GEV发射的轨道调节。我们将场景应用于两个伽马射线二进制文件，即LMC P3和4FGL J1405.5-6119。我们发现，使用LMC P3的建议系统参数，观察到的轨道调制的幅度和峰宽度与模型光曲线更加一致，通过考虑到行驶距离的效果。对于LMC P3，我们使用8年的Fermi-LAT数据分析GEV光谱，并讨论X射线中的宽带发射过程到TEV能量带。我们通过拟合GEV光曲线来预测4FGL J1405.5-6119的系统几何形状。关键词：冲击波，伽玛射线：星星，星星：大型星星：大规模损失，星星：中子
We study GeV emission from gamma-ray binaries by assuming that the compact object is a young pulsar. We assume that the relativistic unshocked pulsar wind with Lorentz factor of 10^4~5 can produce the GeV emission by the inverse-Compton scattering process in the dense soft-photon field of the companion star. The travel distance of the unshocked pulsar wind that moves toward the observer depends on the orbital phase of the pulsar. We discuss that the orbital modulation of the GeV emission is a result of combination of the effects of the travel distance of the unshocked pulsar wind and of the anisotropic soft-photon field of the companion star. In this paper, we study how the effect of the travel distance of the unshocked pulsar wind affects to the orbital modulation of GeV emission. We apply our scenario to two gamma-ray binaries, LMC P3 and 4FGL J1405.5-6119. We find that with the suggested system parameters of LMC P3, the observed amplitude of the orbital modulation and the peak width are more consistent with the model light curve by taking into account the effect of the travel distance. For LMC P3, we analyze the GeV spectrum with 8-years Fermi-LAT data and discuss the broadband emission process in X-ray to TeV energy bands. We predict a possible system geometry for 4FGL J1405.5-6119 by fitting the GeV light curve. Key words: shock waves, gamma-rays: stars, stars: massive stars: mass-loss, stars: neutron
